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ADR01WARZ-R7 Arkusz danych(PDF) 9 Page - Analog Devices |
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ADR01WARZ-R7 Arkusz danych(HTML) 9 Page - Analog Devices |
9 / 20 page Data Sheet ADR01/ADR02/ADR03/ADR06 Rev. R | Page 9 of 20 TERMINOLOGY Dropout Voltage (VDO) Dropout voltage, sometimes referred to as supply voltage head- room or supply output voltage differential, is defined as the minimum voltage differential between the input and output necessary for the device to operate, such as VDO = (VIN – VOUT)min|IL = Constant Because the dropout voltage depends upon the current passing through the device, it is always specified for a given load current. Temperature Coefficient (TCVO) The temperature coefficient relates the change in output voltage to the change in ambient temperature of the device, as normalized by the output voltage at 25°C. This parameter is expressed in ppm/°C and can be determined by the following equation: ( ) [ ] C ppm/ 10 ) 25 ( ) ( ) ( 6 1 2 1 2 × − × − = T T C V T V T V TCV OUT OUT OUT O where: VOUT(25°C) is the output voltage at 25°C. VOUT(T1) is the output voltage at Temperature 1. VOUT(T2) is the output voltage at Temperature 2. Output Voltage Hysteresis (ΔVOUT_HYS) Output voltage hysteresis represents the change in output voltage after the device is exposed to a specified temperature cycle. This may be expressed as either a shift in voltage or a difference in parts per million from the nominal output as follows: VOUT_HYS = VOUT(25°C) – VOUT_TC [V] ] ppm [ 10 ) 25 ( ) 25 ( 6 _ _ × − = C V V C V V OUT TC OUT OUT HYS OUT where: VOUT(25°C) is the output voltage at 25°C. VOUT_TC is the output voltage after temperature cycling. Thermal hysteresis occurs as a result of forces exhibited upon the internal die by its packaging. The effect is more pronounced in parts with smaller packages. Long-Term Stability (ΔVOUT_LTD) Long-term stability refers to the shift in output voltage at 25°C after 1000 hours of operation in a 25°C environment. This may also be expressed as either a shift in voltage or a difference in parts per million from the nominal output as follows: ΔVOUT_LTD = |VOUT(t1) – VOUT(t0)| [V] ] ppm [ 10 ) ( ) ( ) ( Δ 6 0 0 1 _ × − = t V t V t V V OUT OUT OUT LTD OUT where, VOUT(t0) is the VOUT at 25°C at Time 0. VOUT(t1) is the VOUT at 25°C after 1000 hours of operation at 25°C. Line Regulation Line regulation refers to the change in output voltage in response to a given change in input voltage, and is expressed in either percent per volt, parts per million per volt, or microvolt per volt change in input voltage. This parameter accounts for the effects of self-heating. Load Regulation Load regulation refers to the change in output voltage in response to a given change in load current, and is expressed in either microvolts per milliampere, parts per million per milliampere, or ohms of dc output resistance. This parameter accounts for the effects of self-heating. |
Podobny numer części - ADR01WARZ-R7 |
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Podobny opis - ADR01WARZ-R7 |
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